[Feature] Ltx video 2b support #2138

Feature Summary

support for ltx video 2b should

Detailed Description

Ltx video 2b should have been supported a long time ago, there is no any model like it for now that can be 8 steps, i2v and t2v in one, would be nice if sd.cpp would support it even if it was made a long time ago, to have a small model that is not wan 2.1 vace or lingbot dense 1.3b, it takes a nice small middle tier

Alternatives you considered

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Additional context

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